All conditioned things are impermanent. This is what the Buddha taught.
Anicca. I haven't found any exceptions so far.
Gibberish is gibberish...
That sounds very Mahayana-ish. I haven't seen anything about "original nature" in the Pali suttas. Nor about exceptions to anicca. Maybe nibbana itself, but nothing besides that.
Illusions are very concrete things so what is your point?
The end result is self justified because you say so?